US3787382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photopolymerization of tetrafluoro-ethylene and polymer and products produced therefrom
Assignee: General Electric Co
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Filing: 1972-02-16
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Granted: 1974-01-22
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Expires: 1992-02-16
Abstract
Abstract A PROCESS FOR PRODUCING NOVEL WHITE POWDERY TETRAFLUOROETHYLENE POLYMER BY IRRADIATING TETRAFLUOROETHYLENE MONOMER VAPOR AT A TEMPERATURE RANGING FROM ABOUT 0* TO ABOUT 200*C. AND AT A PRESSURE OF ABOUT 10 TORR TO 760 TOOR WITH ULTRAVIOLET LIGHT HAVING A WAVE LENGTH IN THEE RANGE OF ABOUT 1800 TO 2400 ANGSTROMS. THIS POLYMER CAN BE FUSED GENERALLY AT TEMPERATURES OF ABOUT 350*C. AND LOWER, TO FORM COATINGS, PARTICULARLY WATER-CLEAR COATINGS, SELF-SUPPORTING FILMS AND OTHER SHAPED PRODUCTS.
Inventors
- 👤 A Wright
- 👤 W Burgess
- 👤 E Wilkus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:43
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08F; C08F14/00; C08F14/18; C08F14/26; C08J2327/00; C08J2327/02; C08J2327/12; C08J2327/18
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |